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Does anyone here know how I might go about testing a GM ignition module.

Posted By charliemccraney 15 Years Ago
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Does anyone here know how I might go about testing a GM ignition...

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charliemccraney
Posted 15 Years Ago
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Supercharged

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It seems to be fine!


Lawrenceville, GA
pintoplumber
Posted 15 Years Ago
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I figured you'd like that one Charlie. Any update?

http://forums.y-blocksforever.com/uploads/images/3047f5ac-add1-4e79-a3ed-14ea.jpg  Dennis in Lititz PA
charliemccraney
Posted 15 Years Ago
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HA. That made me laugh.


Lawrenceville, GA
MarkMontereyBay
Posted 15 Years Ago
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pintoplumber (3/24/2010)
Pick another grocery store.




Ha ha! That is a good one. Better than the old stand by for an annoying mystery noise from somewhere in the car, often not heard by the mechanic..."Turn up the radio."

57 Black Tbird 312/auto



pintoplumber
Posted 15 Years Ago
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Pick another grocery store.

http://forums.y-blocksforever.com/uploads/images/3047f5ac-add1-4e79-a3ed-14ea.jpg  Dennis in Lititz PA
charliemccraney
Posted 15 Years Ago
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This doesn't have a resistor. It gets a full 12v.



I think I fixed it. Since everything checked out ok, I trusted my heat soak theory and went ahead and got a reman distributor. My pickup coil connector fell apart when I was testing it. That and the module comes with the whole distributor for about $10.00 more. That's my reasoning for getting a whole distributor. I think the module is the problem. It uses a thermal compound between it and the distributor body to transfer heat for cooling, much like a cpu in a computer. The distributor body is the heat sink. When I removed the module for testing, That grease had long been dried up. It didn't look like any was there. I have to say, the original one is still in great mechanical shape. I couldn't detect any side play and it turns very smooth. I may not return it for the core charge.

Anywho, I idled it in the driveway until it was up to temp. It didn't die. I shut it off, went inside for about 20 minutes, went back out, and started it! Now it's time for a test drive to the grocery store where it originally quit. Fingers crossed.


Lawrenceville, GA
Eddie Paskey
Posted 15 Years Ago
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Hey Charlie;;    Have you looked at the resisror wire to the switch???   Don't know if the more modern cars have these, but had customer's car that would do that to me???   Yeah those kinds can drive ya crazy!!!   Just food for thought--   Good Luck and many Thanks--  always enjoy your info-- thanks for sharing    God Bless

Eddie

Lake Forest, Ca. 92630

charliemccraney
Posted 15 Years Ago
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It started this morningAngry Intermittent stuff really drives me up the wall.


Lawrenceville, GA
charliemccraney
Posted 15 Years Ago
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I did some checking today and found nothing wrong.

It did start this morning. So I'm thinking it might have something to do with heat soak. I drove it to a friend's house and tested the theory. It started up immediately after turning it off. I tried it a couple times. But sure enough, I let it sit about 20 minutes and it wouldn't start. I checked the ignition coil, pickup coil, and took the module to Advance for testing. And of course, all 3 checked out ok. Fortunately, just as I had pulled into my driveway, it died while running. So maybe it is for good this time and I can figure it out.


Lawrenceville, GA
charliemccraney
Posted 15 Years Ago
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MarkMontereyBay (3/20/2010)
Does Autozone, etc. test distributors for customers?




Very good question. On my way out for food, I stopped by Advance Auto. They can test the module! That will make it real easy. My repair book goes over testing the coil. I have the leads to do that, now. So, that's what I'll be working on on Monday. With any luck, it'll be running on Monday.


Lawrenceville, GA


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